Honda Clarity, ZC4/ZC5/ZC6 (USA / CAN)

Additional Notes

• The Honda Clarity ZC6 electric variant carries a 5-liter cooling system capacity, a figure that reflects the thermal management demands of its battery and electric drive components rather than a combustion engine.
• The Clarity ZC4 hydrogen variant has a notably smaller cooling system capacity of 3.1 liters, making it the lowest-capacity configuration across the three Clarity variants covered in these specifications.
• The Clarity ZC5 plug-in hybrid shares the same 5-liter cooling system capacity as the ZC6 electric, despite housing a different powertrain that combines a combustion engine with electric drive components.
• All three Clarity variants follow a flexible service interval governed by the on-board maintenance system, meaning coolant service timing is determined by the vehicle's own monitoring rather than a fixed mileage or time schedule.
• The ZC4 hydrogen variant's 3.1-liter capacity is roughly 38 percent lower than the 5-liter figure shared by the ZC5 and ZC6, a difference that points to a more compact or differently routed cooling circuit in the hydrogen fuel cell powertrain.
• The ZC6 electric and ZC5 plug-in hybrid model year coverage both begin in 2017, while the ZC6 electric coverage ends in 2019 compared to the ZC5 and ZC4, which extend through 2021.